Clark robinson gavit



(No Model.)

0. R. GAVIT. AUTOMATIC RAILROAD GATE.

No. 363,133 Patented May 17,1887.

WITNESSES NITE STATES ATENT Orrrcn.

CLARK ROBINSON GAVIT, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND JOSEPH J. WVALTON, OF SAME PLACE.

AUTOMATIC RAILROAD-GATE.

SPECIFICATION forming part of Letters Patent No. 363,133, dated May 17, 1887.

Application filed March 30, 1887. Serial No. 233,049. (No model.)

To all whom, it may concern:

Be it known that I, CLARK ROBINSON GAVIT, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Automatic Railroad Gates; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference IO marked thereon, which form part of this specification, in which- Figure 1 represents a detail side elevation of a portion of elevated-railroad track having my improved safety-gates or automatic gateoperating mechanism applied. Fig. 2 is a plan view of the operating mechanism for the gates detached. Fig. 3 is aside elevation of Fig. 2, and Fig. 4 a detail sectional view showing the cam-block and its operative connections.

This invention relates to improvements in automatic railway-gates which are operated by means of an arm orfinger upon the locomotive, so that the engineer can at will cause the opening of the gates automatically as the train comes to a stop before the depot.

The invention is especially designed for use on elevated railroads, and is so shown in the accompanying drawings; and it consistsin the novel construction and arrangement of parts,

hereinafter described, and specifically designated in the claims.

Referring to the drawings by letters, A designates a portion of railroadtrack having at 5 one side, or the side next the passenger-depot, one or more horizontally-moving gates or doors,B, swung or hung upon rollers and moving on guideways parallel with the line of track.

At proper points upon the track, on either side of gate B, are secured upon a bar, 0, or to the tie-beams of the track, and at a suitable distance apart, a metal block, D, and a bracket, E, through suitable openingsin which 5 plays laterally a metal bar or rod, F, which is angular in cross-section,so that it will be prevented from rotating within its bearings in block D and bracket E. The distances between parts D and E should correspond with the width of the gate, for a reason hereinafter shown, and the bar F should be of considerably greater length than the distance between said parts.

- Upon bar F isjournaled an oscillating lever,

G, which, when the parts are in normal position, stands close to bracketE on theside next block D. The lever G is formed with ashort arm, g, on the side of bar F opposite the rails of the track, and with an arm, H, on the side next the track, the latter arm being longer than the former, and both standing normally in the same horizontal plane as bar F, but

at right angles thereto, as shown. The arm 9 is suitably weighted to keep the lever in this position, and the arms have journaled upon their ends frietion-rollers I I, as shown, for a purpose hereinafter set forth.

The block D is preferably formed with a portion, D, standing at right angles to the bracket portion dthereof and extendinginward toward block E, close to and nearly parallel with bar F. This portion D rises considerably above the part d at its outer end, and thence extends downward and inward toward block E, as shown.

d designates a cam-groove formed in part D, and adapted to receive the roller I on the arm g of lever G and cause the oscillation of the latter when the lever is forced forward toward block D, as hereinafter shown, such movement ofthe lever G necessarily causing the lateral shifting of bar F.

e designates a bracket similar to bracket E and placed at a suitable point in rear of said bracket, and serving to support the rear end 8' of bar F, as shown.

f designates a series of ratehets or teeth formed on the upper surface of bar F, at suit able points thereon, so that when the barFis shifted laterally by lever G, as described, the teeth f will be in a position to be engaged by a dog, J pivoted between ears rising from bracket E, as shown, and the bar cannot be re tracted until the dog is disengaged.

K designates a chain or rope connected to the rear end of bar F, and passing thence over suit-able pulleys to a depending weight, -k, which has sufficient vertical movement to cause the retraction of bar F to its normal position when the dog J is released. The releasing of said dog is effected by means of a cord or chain,j, which is connected to the dog, and

passes thence over suitable pulleys to a convenient point near the gate 13, as shown, so that the gateman can release the pawl by pulling on said rope. When the bar F is in normal position, as described, the weight 70 is down. The chain K extends from the bar to the weight just below the bottoms of gates B, and is securely connected to said gates at corresponding points of its length by means of rods or braces I), as shown, so that the movement of chain K will shift the gates also, as is evident.

The action of the cam d as the lever is pushed forward by the finger L causes the lever to oscillate until its arm H is forced downward out of engagement with said finger, this occurring before the arm 9 has passed entirely over the cam, so that the lever will not be displaced or strained by abutting against the part (I of the block. Simultaneously with the disengagement of arm H and finger L the dogJ engages the teethfof the bar and retains it in the position it had reached when the lever G was disengaged. The chain K, being attached to bar F, as described, is of course moved forward with this bar, raising weight k and shifting the gates 13 laterally on their ways, opening the same.

When it is desired to close the gates, by

, simply pulling on chainj the dog is released,

and the weight It, acting through chain K, closes the gates and retracts the bar to its nor mal position, the lever G again assuming a position for engaging the finger of the locomotive, to be operated thereby, as before.

Having described my invention, I claim 1. In an automatic railroad-gate, the combination of an angular laterally-movable bar mounted in suitable brackets, and having an oscillating arm swung thereon adapted to be engaged by a finger or arm upon the locomotive to shift said bar laterally, and a cam adapted to cause the disengagement of said lever and arm, and suitable means for connecting said bar to the gates and for automatically returning it to its normal position, all constructed and adapted to operate substantially as and for the purpose described.

g 2. The combination of suitable brackets carrying a laterally-movable angular bar, an oscillating lever pivoted on said bar and provided with friction-rollers on the ends of its arms, and adapted to be engaged by afinger or arm upon the locomotive to shift said bar laterally, and a suitable cam-block for causing the disengagement of the lever and arm, a pawl for retaining the bar in position when shifted, and suitable connections between the bar and the gates, a suitable device to disengage the pawl from the bar, and a suitable weight for causing the return of the bar toits normal position and closing the gate, all substantially as and for the purpose specified.

3. The combination of the angular bar F, mounted on suitable brackets, the lever G, pivoted on said bar between the brackets, and having friction-rollers on its ends,substantiall y as described, adapted to be engaged by its inner. arm with a finger or arm upon the locomotive to shift the bar laterally, and a camblock, 1), adapted to engage the outer arm of said lever and cause the disengagement of the finger and lever, and suitable connections for operating the gates and returning the bar F to its normal position, all substantially as and for the purpose specified.

' 4. The combination of bar F, mounted in suitable brackets, lever G, pivoted on said bar between the brackets and adapted to engage a finger, L, on the locomotive, the rollers I I on the ends of said lever, with'the camblock D, the chain K, gates B, and weight It, all constructed and arranged substantially as and for the purpose specified.

5. The combination of the block D, having cam portion D and the bracket E, the bar F, journaled in said block and bracket, the oscillating lever G, adapted to engage a finger on the locomotive, its friction-rollersI I, the dog J, for engaging teeth f of the bar, its controlling-cord j, and the chain K, connecting the gates and barFand havingaretracting-weight, Ir, at itsend, all constructed and adapted to operate substantially in the manner and for t-he purpose specified.

In testimony that I claim the foregoing as my o'wnI affiX my signaturein presence of two witnesses.

CLARK ROBINSON GAVIT.

ICO 

